I've received at least one of those emails too. I just ignored it. (I say at least one because I marked it as junk and so my email client may be sending additional ones to my junk mail folder.)
This might help:
https://malwaretips.com/blogs/have-you-heard-about-pegasus-blackmail-email-scam/
If you don't like smart TVs, there are still a few dumb TVs I think (or used on ebay at least!). Also you can find a smart TV that doesn't require an internet connection. (ie: will act dumbish if no internet.) If you want to stream, get a cheap small streaming device (Roku Express etc.) that can simply be throw out if something really bad happens.
